Ecuador – Tungurahua volcano in Ecuador spewed truck-sized pyroclastic boulders on Friday in an eruption prompting at least 300 people to evacuate, several international news sites reported on Friday.

The volcano was said to be located on the Andes cordillera 135 kilometers of Quito, Ecuador‘s capital. According to reports, thundering explosions could be heard miles from Tungurahua.

“The smallest blocks are that size of an automobile while the biggest reach the size of a truck, which cause impact craters up to 10 meters wide as they hit the flanks,” Silvana Hidalgo, a state Geophysics Institute scientist who monitors the volcano from a close observation post, was quoted saying.

Schools were already closed for 3 straight days as ash showered the towns surrounding the volcano, reports said.